Security Advisory

CVE-2026-23519

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-01-15 19:13:54

Last updated 2026-01-15 19:57:48

Assigner GitHub_M

State PUBLISHED

Description

RustCrypto CMOV provides conditional move CPU intrinsics which are guaranteed on major platforms to execute in constant-time and not be rewritten as branches by the compiler. Prior to 0.4.4, the thumbv6m-none-eabi (Cortex M0, M0+ and M1) compiler emits non-constant time assembly when using cmovnz (portable version). This vulnerability is fixed in 0.4.4.

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